111102212121211 has 4 divisors (see below), whose sum is σ = 111197742829272. Its totient is φ = 111006681413152.

The previous prime is 111102212121181. The next prime is 111102212121223. The reversal of 111102212121211 is 112121212201111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111102212121211 - 2⁹ = 111102212120699 is a prime.

It is a super-2 number, since 2×111102212121211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111102212121611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47765352286 + ... + 47765354611.

It is an arithmetic number, because the mean of its divisors is an integer number (27799435707318).

Almost surely, 2^{111102212121211} is an apocalyptic number.

111102212121211 is a deficient number, since it is larger than the sum of its proper divisors (95530708061).

111102212121211 is an equidigital number, since it uses as much as digits as its factorization.

111102212121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95530708060.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111102212121211 its reverse (112121212201111), we get a palindrome (223223424322322).

The spelling of 111102212121211 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred eleven".